AUTHOR : 김재현, 김두영, 박권일, 윤명환, 홍정표
ORGANIZATION : 한국자동차공학회
JOURNAL :
YEAR : 2017.05
VOL :
PAGE :
Recently, hybrid vehicles and electric vehicles are attracting attention as eco-friendly vehicles, and many devices of automobiles are being replaced by electronic control devices. Hydraulic power steering(HPS) ha sbeen mainly used as a steering device for automobiles until now, but recently electric power steering(EPS) has been spreading. Since the vibration of the steering device is transmitted directly to the driver, the vibration problem must be carefully considered in the motor design for EPS. Therefore, torque ripple in the EPS should be reduced to improve the vibration characteristics. In this paper, in order to reduce the torque ripple of surface mounted permanent magnet synchronous motor(SPMSM) for EPS, the harmonic component of induced voltage is analyzed. To reduce the harmonic component of induced voltage, eccentric rotor shape is applied. Space harmonic analysis is used to determine eccentric length, and torque ripple is reduced from 8.6% to 4.2%.